ABSTRACT
The slope stability is one of the most important issues in the safety of high rockfill dam. At present time, the conventional methods for conducting slope stability analysis include: limit equilibrium method, limit analysis method, and slip line field method. The constitutive model of the materials in the analysis is Mohr-Coulomb model and the factor of safety of the slope is determined by strength reduction method. In the analysis, the development of equivalent plastic strain of dam slope under different strength reduction factors was presented. Compare with the conventional limit equilibrium method, the proposed strength reduction method can not only provide the similar factor of safety, but also the strain and deformation changes of the slope. The slope stability is one of the most important issues in the safety of high rockfill dam. In the slope stability analysis by using strength reduction FEM method, the criteria for determining the critical state of slope failure is one of the key points.
